Nut-lock.



J. POPP @L G. PLOPA.

NUT LOOK.

APPLIOATION FILED sEPT.1,191o.

Patented Feb. 14,1911.

` J. PoPP a; d; PLOPA.

NUT LOCK.

APPLICATION FILED SEPT. 1,1910.

Patented Feb. 14, 1911.

2 SHEETS-SHEET 2.'

JOHN POPP AND CHARLEY PLOIEA, OF PORTAGE, PENNSYLVANIA.

NUT-LOCK.

Specification of Letters Patent.

Patented Feb. 141i, i911.

Application led September l, 1910. Serial No. 580,122.

To all whom it may concern:

Be it known that we, Jol-IN Iorr and Ci-IARLEY Piera, citizens of the United States, residing at Portage, in the county of Cambria and State of Pennsylvania, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification.

This invention relates to new and useful improvements in nut locks.

The primary object of this invention is to provide simple and effective means for securely locking the nut against working loose on the bolt after the former has been screwed up to the desired position.

A further object of the invention is to provide means whereby the operator may release the locking means to permit of the ready removal of the nut from the bolt should occasion necessitate.

IV ith the foregoing and other objects in view, the invention consists in the novel features and construction, combination and arrangement of parts illustrated in the drawings and more particularly pointed out in the appended claims.

In the accompanying drawings Figure l is a sectional view of a bolt and nut illustrating the locking means for the latter. Fig. 2 is a vertical transverse sectional view taken through the nut and bolt on the plane indicated by the dotted line 9.-*2 of Fig. 5. Fig. 3 a horizontal section taken on line 3 3 of Fig. Fig. 4 is a similar view, showing the locking key in released position. F 5 is a vertical transverse sectional view taken on line 5)5 of Fig. 2. Fig. (3 is a longitudinal sectional View of a modified form of nut lock. Fig.' 7 is a similar view taken through the nut at a different point to more particularly disclose the construction and action of the locking means. Fig. 8 is a detail perspective view of the lockingineans. Fig. 9 is a similar view of the bolt-engaging member, and Fig'. 10 is a vertical transverse section taken on line lO--l0 of Fig. 7.

Referring more particularly to the drawings 1 indica-tes the bolt which is of any ordinary construction, 2 the nut, 3 the boltengaging member and t the locking means.

The bolt-engaging member, shown more particularly in Fig. 9, is in the form of a hollow ring or sleeve provided at its inner surface with a longitudinal key 5 adapted for sliding engagement with a longitudinal groove 6 in the threaded portion of the bolt. This member is further provided on its eX- terior surface with an annular groove 7 and with an annular series of equally spaced recesses 8, any one of which is adapted to receive a slidable locking key 9 mounted in a suitable recess l0 in the nut 2.

In the preferred form of nut lock, illustrated in Figs. l t6 5 inclusive of the drawings, the key is provided at one face and at opposite sides with the toothed or serrated ribs ll, the teeth of which are adapted to engage corresponding teeth l2, formed in the adjacent wall of the recess l0 in the nut. To provide for the normal engagement of the teeth ll of key 9, with the teeth l2 in the nut, a fiat spring 13 is employed, one end of which bears against the key and the opposite end of which is attached, as at lll, to the opposite wall of the recess 10. When the key 9 is in locking position, as indicated in Fig. 3, it engages one of the recesses 8 of the bolt-engaging member 3 and locks the nut against rotation upon the bolt-engaging member.

In screwing the nut on the bolt, the key 9 must be in the position indicated in Fig.

a when the nut may be turned with relation to the bolt-engaging member which is caused to slide bodily upon the bolt until the nut has been screwed up to the required extent. This done, a key 15 is inserted through an aperture 1G in the nut and the bit 17 of the key caused to engage a corresponding recess la in the face of the key 9 when the latter is forced or moved in the position indicated in Fig. il, when it engages one of the recesses 8 of the bolt-engaging member and locks the nut against rotation with relation thereto. lo remove the bolt, the key 9 is removed from the position indicated in Fig. il, to the position as indicated in Fig. L In the modified forni of the invention, illustrated in Figs. G to 10 inclusive, the locking key 9l is hel d in engagement with one of the recesses of the bolt-engaging member by a coil spring 19 arranged in a suitable recess i0 in the nut. The outer end of the locking key 9l is provided with a key shaped longitudinally disposed recess 2l for the reception of a key used to slide the key 91 into retracted position during the operation of screwing the nut upon the bolt. vAfter the nut has been screwed to the desired position, however, the key is removed when the locking key 9* is projected into engagement with one of the recesses 8 of the bolt-engaging member 3 by the action of the spring 19. The key 91 is provided with an undercut recess 22 at the inner end of the key shaped opening 2l, leaving a shoulder 23 adapted to be engaged by the bit of the key in moving the latter into retracted or releasing position.

The nut is provided at its inner end with an annular series oil apertures 2i adapted to receive a plurality of pins or screws 25 which pass through the nut and project into the annular recess 7 in the exterior surface of the bolt-engaging member. The purpose of these pins or screws is to prevent bodily displacement of the nut on the boltengaging member.

From the foregoing description taken from the drawings, it is thought that the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Having described our invention, what we claim as new and desire to secure by Letters Patent, is

l. A nut lock of the class described comprising a bolt-engaging member, means for permitting sliding engagement between the bolt and said member, a nut mounted to turn upon the bolt-engaging member, said nut having a recess formed therein provided in one wall with teeth or serrations, a locking key slidably mounted in the recess of the nut, and having toothed portions to engage the teeth of the nut, resilient means to nor- Ymally hold the teeth of the locking key in engaged relation with the teeth of the nut.

2. A nut lock of the class described comprising a bolt-engaging member having a plurality of annular recesses formed in its exterior surface, means for permitting sliding engagement between the nut and bolt, a spring-controlled locking key mounted in a recess of the nut and adapted to engage anyone of the recesses of the bolt-engaging member, said key being capable of bodily adjustment whereby it may be moved into projected or retracted position and resilient means to hold the key in projected posit-ion.

3. A nut lock of the class described comprising a bolt-engaging member having a plurality of annular recesses formed in its exterior surface, means for permitting sliding engagement between the nut and bolt, a spring-controlled locking key mounted in a recess of the nut adapted to engage anyone of the recesses of the bolt-engaging member, said key being capable of bodily adjustment whereby it may be ymoved into projected or retracted position and resilient means to hold the key in projected position and means to hold the lbolt-engaging member against bodily displacement upon the nut.

In testimony whereof We affix our signatures in presence of two witnesses.

JOHN rorr. crninnnv rtora.

Vitnesses J. VALLAGE PAUL, JOHN BURNNETT. 

